Good
Okay, good so far, a few things I noticed were that:
1. it was annoying to look at the top right of the screen to see what damage I was doing, to give it more of a game effect, make like the damage number raise, from the attacked unit.
2. Needs background music, it's kinda of wierd when theres music on the start page, but not the actual game, it doesn't have to be loud, but just enough so it doesn't interfere with the SFX, those were good by the way.
3. Graphics were top notch, but you need more specail effects, the only interesting one you had was the Metal Stinger.
4. You can add in an 'overdrive' because usaually things don't go down with out a fight. Another word you can use is, 'Ultimate' or something.
Good job overall, these are just some things I would work on, if I were you. This game would be an awesome online game, Nice job.